黄土高原塬区户养绵羊生产系统的研究

A study on sheep feeding systems farmer households on the loessplateau

比较放牧、半放牧和舍饲3个生产体系绵羊的生产性能。舍饲羊圈舍积肥量是放牧羊的两倍，舍饲羊的劳力投入是放牧羊的30 %。农区绵羊冬季放牧麦青、以及补饲等均有利于放牧羊的生长。对维持放牧羊的体质量无疑是有益的。冬季的纯放牧不利于增重。

The sheep production under three feeding conditions included free grazing, half of the year grazing and the remainder housed, and whole year housed in farmer households on the Loess Plateau was compared. Under whole year housed condition, faeces accumulation in fold was two times and labour costs was 30% of it in free grazing, respectively. In the cropping region, both grazing on wheat stubble and supplement benefited for sheep weight maintenance and growth in winter, whereas sheep growth was adversely affected by free grazing without supplement in winter.